Bethesda is taking a stand.
The Elder Scrolls: Legends is a card game which is surprisingly popular on PC and mobile devices. Not only that, but upon release it garnered positive reviews. Just like Hearthstone, it involve turn-based matches where you have to one-up your opponent by playing the right "creatures" at the right time. The title costs no money because it's available as a free-to-play experience across a variety of platforms.